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Device memory bus has an error and may be hung...

Hi all,

- I get the following error when debugging my c5505 board. I've lowered TCLK(up to 10khz) as it requests but it didn't work

C55xx: Can't Single Step Target Program: (Error -2130 @ 0x400) Unable to access device memory. Verify that the memory address is in valid memory. If error persists, confirm configuration, power-cycle board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Release 5.0.333.0) 

C55xx: Trouble Reading PC Register: (Error -1143 @ 0x0) Device memory bus has an error and may be hung. Verify that the memory address is in valid memory. If error persists, confirm configuration, power-cycle board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Release 5.0.333.0)

 

- I get these errors when I step over  the instruction below 

SPI_SPICCR = 0x0000; // SPI clock disabled              ( SPI_SPICCR   has address of 0x3001)

- Same error exists for other spi registers when I step them over. Also when I view the memory, I see BAD mark beginning  from 0x3000's.

- There is no problem when I debug demo boards on which they have VC5505, but problem arises on my C5505 board.

- I know they have the same register address

- What could be the reason?

Thanks...